Topic: The Perfect Surround Loudspeaker?

[markcrenz]

Just read this from a technical article:

A very wide, uniform horizontal directivity pattern is needed to provide the localization cues for directed sound effects and to establish the basis for the perception of envelopment. Conventional forward firing or bidirectional in-phase on-wall loudspeakers are eminently capable of delivering those experiences, but excellence is guaranteed only for the central seating area.

As listeners move toward the sides, sounds arriving from the nearer loudspeaker get rapidly louder, and those from the opposite loudspeaker get quieter. The sense of envelopment is progressively diminished, and it eventually disappears, replaced by sound emerging from the nearby loudspeaker. Figure 16.8 explains the cause - propagation loss - and proposes one solution: full-height line-source loudspeakers. However, as good as they may be, for reasons of size and cost they are not practical solutions for the mass market. A target performance for "the perfect surround" loudspeaker was also proposed: a loudspeaker with, in effect, no propagation loss.

more from http://www.eetimes.com/design/audio-design/4213456/Loudspeakers--Objective-evaluations---Part-4--Measurements-of-real-world-consumer-loudspeakers?pageNumber=4

sample pic of full-height line-source loudspeakers

[buzzworth]

kaya pala yung sa mga movie houses, ang daming surround speaker..mali pala yung notion na hindi na ganon ka importante yung surround speakers...after reading the article, don ko lang na notice na parang may kulang..this is another case of SARS..

[audiojunkie]

so, it means we can add more speakers for L/R surrounds  to achieve more enveloping sounds... but think it's only posssible if the amp can takethe additional load or we need also to add extra amp for this purpose... more SARS...        

[sound garden]

In my opinion kapag nakita ni Master A yang surround speaker na yan. Im sure may nagawa na sya na ganyan. Thats a true envelopment of sound